I bought these in two different sizes, L and XL...I'm about a 10/12 right now and generally have broad shoulders and back, am square through the middle and have narrow hips. I love both sizes of these, the XL for being more casual and relaxed, and the L is a little tighter (not scandalously or lumpily so tho) and the weight is such I don't feel I need to wear an undershirt if I don't want to. Nice wool, not itchy, although I always say wool is a state of mind and you have to adjust your thinking from silky synthetic to natural fibers. Anyhoo. These are going with me to Europe in a backpack. They roll up nice and small,dry super fast, weigh nothing, and look pretty trim and not camping-ish like I was afraid they would. Very happy with this purchase. The blue is a very bright periwinkle...not as electric as the pic suggests...but a pretty jewel tone nonetheless.
I ordered a ton of Icebreaker stuff for an upcoming European backpacking trip...and I am in love. I think this sweater is probably my favorite. I originally ordered it too big (an XL), since someone said it ran small in a review. I am 5'4", around 170 (build like a little brick, very straight through the rib cage and waist) and a 38B and the medium fits BEAUTIFULLY. I've tried it on with jeans, travel pants, capris, my travel dresses, my dressier travel dresses, tanks and skirt combos...I am impressed. It makes everything look like a real outfit and not just a random collection of travel clothes. Open or closed, it looks perfect. And it is a nice layering weight too. Will pack down small. Not itchy. Like the color. Love, love, loooooove.